Portion of a footwear upper



FIG. 1 is a perspective view of my portion of a footwear upper in accordance with an embodiment of the invention;

FIG. 2 is a left view thereof;

FIG. 3 is a right view thereof; and,

FIG. 4 is a rear view thereof. 

The ornamental design for portion of a footwear upper, as shown and described. 